Here are 6 Bible verses about human imperfection from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
James 3:2 KJV
For in many things we offend all. If any man offend not in word, the same is a perfect man, and able also to bridle the whole body.
Revelation 3:2 KJV
Be watchful, and strengthen the things which remain, that are ready to die: for I have not found thy works perfect before God.
1 Corinthians 13:10 KJV
But when that which is perfect is come, then that which is in part shall be done away.
Philippians 3:12 KJV
Not as though I had already attained, either were already perfect: but I follow after, if that I may apprehend that for which also I am apprehended of Christ Jesus.
Job 9:20 KJV
If I justify myself, mine own mouth shall condemn me: if I say, I am perfect, it shall also prove me perverse.
Ecclesiastes 7:20 KJV
For there is not a just man upon earth, that doeth good, and sinneth not.